Yes I did some internal overhaul of invidious-companion video fetching and retry behavior. I also increased the compute power of the companion edge server. I will still look if this is possible to merge.
Sorry for the late reply.
Invidious is a front-end / proxy for YouTube. You can check the source code from the Invidious project at https://github.com/iv-org/invidious
If you have any specific questions regarding my instance of invidious feel free to ask.